碰到一些错误无法改正

#include<iostream>
#include<cmath>
using namespace std;
class Point{
         public:
             Point(float x,float y)
                 {
                   pointx=x;
                   pointy=y;
                 }
         void showpoint()
               {
				   cout<<"点的坐标为：("<<pointx<<","<<pointy<<")"<<endl;
               }
         friend float dist(point &a,point &b);
         private:
              float pointx;
              float pointy;
};
float dist(point &a,point &b)
{
     return sqrt((a.pointx-b.pointx)*(a.pointx-b.pointx)+(a.pointy-b.pointy)*(a.pointy-b.pointy));
}
int main()
{
         Point p1(3,3);
		 p1.showpoint();
		 
         Point p2(0,0);
		 p2.showpoint();
         dist(p1,p2);
         cout<<"两点之间的距离是："<<dist(p1,p2)<<endl;
         return 0;
}

下面是错误：
p152_5.cpp(15) : error C2061: syntax error : identifier “point”
p152_5.cpp(21) : error C2065: “point” : undeclared identifier
p152_5.cpp(21) : error C2065: “a” : undeclared identifier
p152_5.cpp(21) : error C2065: “b” : undeclared identifier
p152_5.cpp(22) : error C2448: “<Unknown>” : function-style initializer appears to be a function definition
p152_5.cpp(33) : error C2660: “dist” : function does not take 2 parameters
p152_5.cpp(34) : error C2660: “dist” : function does not take 2 parameters
能不能详细解答一下？
题目是设计一个点类，其中包括一对坐标点数据成员，一个求两个点之间距离的友元函数dist和显示坐标点的成员函数，且用数据进行测试

解决方案

(point &a,point &b)
类名跟你定义的不一样，一个大写一个小写

大小写写错了，有几个Point写成了point

#include<iostream>
#include<cmath>
using namespace std;
class Point{
         public:
             Point(float x,float y)
                 {
                   pointx=x;
                   pointy=y;
                 }
         void showpoint()
               {
				   cout<<"点的坐标为：("<<pointx<<","<<pointy<<")"<<endl;
               }
         friend float dist(Point &a,Point &b);
         private:
              float pointx;
              float pointy;
};
float dist(Point &a,Point &b)
{
     return sqrt((a.pointx-b.pointx)*(a.pointx-b.pointx)+(a.pointy-b.pointy)*(a.pointy-b.pointy));
}
int main()
{
         Point p1(3,3);
		 p1.showpoint();
		 
         Point p2(0,0);
		 p2.showpoint();
         dist(p1,p2);
         cout<<"两点之间的距离是："<<dist(p1,p2)<<endl;
         return 0;
}